shirtless: unidentified tennis object

While we prefer our guys nameless, it’s in everyone’s best interest to know more about this fella. Can anyone help with the ID? We found him hitting with Viktor Troicki before Troicki’s doubles match (with Janko Tipsarevic) against Kas/Norman at the 2010 BNP Paribas Open. (The Serbians won 10-8 in the third set; men’s doubles draw here.)

Need more information? Click for a few more pics of Troicki’s hitting partner — after the cut…